Alternating Current

In a \(L C R\) series circuit source voltage is \(120 \mathrm{~V}\) and voltage in inductor \(50 \mathrm{~V}\) and resistance is \(40 \mathrm{~V}\), then determine voltage in the capacitor

If maximum energy is stored in a capacitor
at t = 0, then find the time after which
current in the circuit will be maximum.

A transformer with turns ratio \(\frac{N_1}{N_2}=\frac{50}{1}\) is connected to a \(120 \mathrm{~V}\) AC supply. If primary and secondary circuit resistances are \(1.5 \mathrm{~k} \Omega\) and \(1 \Omega\) respectively, then find out power ...

In a circuit \(L, C\) and \(R\) are connected in series with an alternating voltage source of frequency \(f\). The current leads the voltage by \(45^{\circ}\). The value of \(C\) is

An ideal coil of \(10 \mathrm{~H}\) is connected in series with a resistance of \(5 \Omega\) and a battery of \(5 \mathrm{~V}\). After \(2 \mathrm{~s}\), after the connection is made, the current flowing (in ampere) in the circuit is

In a series R-C circuit shown in figure, the
applied voltage is 10 V and the voltage across
capacitor is found to be 8V. Then, the voltage
across R and the phase difference between
current and the applied voltage will
respectively be

Assertion : The average value of alternating emf is \(63.39 \%\) of the peak value.
Reason : The rms value of alternating emf is \(70.72 \%\) of peak value.

A series R-C circuit is connected to AC voltage
source. Consider two cases; (A) When C is
without a dielectric medium and (B) When C
is filled with dielectric of constant 4. The
current I\(_R\) through the resistor and voltage V\(_C\) acros...